Skyworks Solutions Inc. SI86S605AB-IUR

Overview

SI86S605AB-IUR from Skyworks Solutions is a bidirectional I²C isolator with two unidirectional non-I²C channels, designed for galvanic isolation of SMBus and I²C interfaces in high-reliability systems. It supports 1.7 MHz I²C clock rates, provides 5000 V_RMS isolation, features open-drain SDA/SCL outputs with 35 mA sink capability, and operates across –40 °C to +125 °C - enabling use in battery management systems and isolated digital power communications.

For engineers reviewing the SI86S605AB-IUR datasheet, SI86S605AB-IUR pinout, SI86S605AB-IUR application, or SI86S605AB-IUR equivalent, this page delivers verified electrical parameters, AEC-Q100-qualified automotive-grade operation, SOIC-16 narrow-body package mapping, and real-world design context for I²C bus isolation with integrated anti-latch protection and hot-swap robustness.

Technical Context

The SI86S605AB-IUR implements RF-based semiconductor isolation with independent bidirectional SDA and SCL channels plus one forward and one reverse unidirectional channel - supporting auxiliary signals like RESET and INT. Its anti-latch architecture ensures stable I²C operation by enforcing ΔV_SDA/ΔV_SCL ≥ 50 mV between side-A output low (typ. 540 mV) and input threshold (typ. 410 mV).

Each side features independent undervoltage lockout (UVLO), 3.0–5.5 V supply range, and CMOS-compatible non-I²C inputs/outputs with 50 Ω nominal output impedance. Propagation delays are as low as 11 ns (3.3 V, falling edge, A→B), and transient immunity reaches 50 kV/µs - critical for motor control and PoE applications where ground-loop elimination and EMI resilience are mandatory.

Key Specifications

Pinout & Package

SI86S605AB-IUR is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width), with creepage/clearance optimized for reinforced insulation up to 5000 V_RMS. The package supports JEDEC-standard 260 °C peak reflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C isolator applications.

Compared with SI86S605AB-IUR, SI8605AC-B-IS offers identical functionality but reduced isolation and no automotive qualification, while ADUM1250ARZ lacks auxiliary channels and delivers lower isolation - making SI86S605AB-IUR the sole option meeting 5.0 kV_RMS, AEC-Q100, and dual-unidirectional signal requirements in one SOIC-16 package.

Availability

SI86S605AB-IUR is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and isolated digital power supplies requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.

Supply support for SI86S605AB-IUR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Skyworks Solutions is a global leader in analog and mixed-signal semiconductors, specializing in RF, timing, and isolation technologies for high-performance wireless and wired infrastructure.

The SI86S605AB-IUR belongs to the Si860x family - engineered specifically for robust, low-latency galvanic isolation of I²C/SMBus interfaces in automotive, industrial, and PoE applications where safety, reliability, and signal integrity are critical.

FAQ

What is the isolation voltage rating of the SI86S605AB-IUR?

The SI86S605AB-IUR is rated for 5000 V_RMS isolation per UL 1577 and reinforced insulation standards including VDE 0884-10 and IEC 60950-1. This rating applies for 1 minute and supports continuous working voltages appropriate for automotive battery monitoring and industrial power systems. The SI86S605AB-IUR achieves this using Skyworks' proprietary RF isolation barrier in a SOIC-16 narrow-body package.

Does the SI86S605AB-IUR support hot-swap insertion?

Yes, the SI86S605AB-IUR includes built-in protection circuits that prevent data corruption when an unpowered device is inserted into a live system. This hot-swap capability is enabled by internal clamping and state-holding logic that maintains bus integrity during power sequencing - a key requirement for modular battery packs and field-serviceable PoE equipment using the SI86S605AB-IUR.

How many isolation channels does the SI86S605AB-IUR provide?

The SI86S605AB-IUR provides four total isolation channels: two bidirectional I²C channels (SDA and SCL) plus two unidirectional non-I²C channels - one forward and one reverse - supporting signals such as RESET, INT, or STATUS. This configuration is explicitly defined in Table 1.1 of the Si860x datasheet for part numbers ending in "05", including the SI86S605AB-IUR.

Is the SI86S605AB-IUR qualified for automotive applications?

Yes, the SI86S605AB-IUR is AEC-Q100 qualified and manufactured using automotive-specific process flows, including AIAG-compliant PPAP documentation, IMDS/CAMDS material declarations, and zero-defect methodology throughout design and production. The "-A" suffix in the part number confirms its automotive-grade status, distinguishing it from industrial variants like SI8605AC-B-IS.

What package type is used for the SI86S605AB-IUR?

The SI86S605AB-IUR uses a SOIC-16 narrow-body package (5.3 mm width), RoHS-compliant with 260 °C peak reflow tolerance. This package is documented in Section 11 ("Package Outline: 16-Pin Narrow Body SOIC") and Table 1.1 of the Si860x datasheet, and provides optimized creepage/clearance for 5000 V_RMS reinforced insulation in space-constrained designs.